RECURSIVE SELECT

Nov 1, 2007

Hi,

I��m having following table structure

Table Locations
ID ParentID
1 0
2 1
3 2
4 3
5 4

Table Properties
LocationID Location
1 Europe
2 Western Europe
3 Germany
4 Bavaria
5 Berlin

Represented data in this case means that I have location Europe with its child location Western Europe with child location Germany with child location Bavaria with child location Berlin.
Europe > Western Europe > Germany > Bavaria > Berlin

Now I need SQL statement to perform search on following way:
For example if I search for Western Europe it needs to return not just Western Europe but its child��s to, in this case Germany, Bavaria and Berlin.

Any help appreciated,
Thanks in advance

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How To Do Recursive Select In SQL Server 2000

May 4, 2006

Suppose there's a table named [Category], which has 2 columns:
CategoryID int,
ParentCategoryID int

Each category, except the top most, has a parent category, it's a 1-to-n parent-children relationship.
Now I want to write a stored proc./function that accepts a CategoryID input parameter, and output all the descendent CategoryIDs (son, grand son, ...). How to do that in MSSQL 2000?

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Transact SQL :: Types Don't Match Between Anchor And Recursive Part In Column ParentID Of Recursive Query

Aug 25, 2015

Msg 240, Level 16, State 1, Line 14

Types don't match between the anchor and the recursive part in column "ParentId" of recursive query "tmp". Below is query,

DECLARE @TBL TABLE (RowNum INT, DataId int, DataName NVARCHAR(50), RowOrder DECIMAL(18,2) NULL, ParentId INT NULL)
INSERT INTO @TBL VALUES
(1, 105508, 'A', 1.00, NULL),
(2, 105717, 'A1', NULL, NULL),
(3, 105718, 'A1', NULL, NULL),
(4, 105509, 'B', 2.00, NULL),
(5, 105510, 'C', 3.00, NULL),
(6, 105514, 'C1', NULL, NULL),

[code]....

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How To Convert Recursive Function Into Recursive Stored Procedure

Jul 23, 2005

I am having problem to apply updates into this function below. I triedusing cursor for updates, etc. but no success. Sql server keeps tellingme that I cannot execute insert or update from inside a function and itgives me an option that I could write an extended stored procedure, butI don't have a clue of how to do it. To quickly fix the problem theonly solution left in my case is to convert this recursive functioninto one recursive stored procedure. However, I am facing one problem.How to convert the select command in this piece of code below into an"execute" by passing parameters and calling the sp recursively again.### piece of code ############SELECT @subtotal = dbo.Mkt_GetChildren(uid, @subtotal,@DateStart, @DateEnd)FROM categories WHERE ParentID = @uid######### my function ###########CREATE FUNCTION Mkt_GetChildren(@uid int, @subtotal decimal ,@DateStart datetime, @DateEnd datetime)RETURNS decimalASBEGINIF EXISTS (SELECTuidFROMcategories WHEREParentID = @uid)BEGINDECLARE my_cursor CURSOR FORSELECT uid, classid5 FROM categories WHERE parentid = @uiddeclare @getclassid5 varchar(50), @getuid bigint, @calculate decimalOPEN my_cursorFETCH NEXT FROM my_cursor INTO @getuid, @getclassid5WHILE @@FETCH_STATUS = 0BEGINFETCH NEXT FROM my_cursor INTO @getuid, @getclassid5select @calculate = dbo.Mkt_CalculateTotal(@getclassid5, @DateStart,@DateEnd)SET @subtotal = CONVERT (decimal (19,4),(@subtotal + @calculate))ENDCLOSE my_cursorDEALLOCATE my_cursorSELECT @subtotal = dbo.Mkt_GetChildren(uid, @subtotal,@DateStart, @DateEnd)FROM categories WHERE ParentID = @uidENDRETURN @subtotalENDGORod

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Recursive SQL

Feb 9, 2007

I need to help in writing stored procedure to recursively delete Categories and ads for those categories
Simplified table views:
Category: CategoryID, Name, ParentCategoryID
Ads: AdID, Name, CategoryID
Please help

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How Can I Use Recursive CTE Here

Jun 1, 2007

Hello Everyone,
         I have a purchase order table that holds say 2 columns. PO and OrgPO. That is Purchase Order # and Original Purchase Order # respectively. Assume i have the following rows in the table.
PO         OrgPO
--          ------
po1        NULL
co1        po1
co2        co1
co3        co2
po2        NULL
cpo1      po2
po3        NULL
Now what i would like to report in the output is the PO and along with the lastly generated change order for that po. For eg,
PO     LastCO
--      ------
po1     co3
po2     cpo1
po3     po3
Currently i 'm using function to achieve this effect and i believe this is not the efficient way. I would like to generate this in a much efficient way. Please help me to achieve this.

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Recursive SQL

Jun 11, 2004

Hi

I have problem is getting list of all the Tree Level Employees.here is the my table structure

Manager ~ SubOrdinate
1 ~ 2
1 ~ 3
1 ~ 4
2 ~ 5
2 ~ 6
2 ~ 7
3 ~ 8
3 ~ 9
4 ~ 10
5 ~ 11
SO ON
I NEED THE WAY , HOW I CAN GET THE HIRE
LEVELS ( EG IF I PASS MANAGER(EMPLOYEE NO) 1 IT SHOULD DISPLAY HIS 1 LEVELS AND 2, 3 SO ON LEVELS OF LEVELS
OUTPUT COULD BE ,

PASSED EMPLOYEE NO : 1
LEVEL ~ EMPLOYEE
1 ~ 2
1 ~ 3
1 ~ 4
2.1 ~ 5
2.1 ~ 6
2.1 ~ 6
3.1 ~ 7
SO ON THAT EMPLOYEE RELATED INFORMATION
( ITS LIKE MLM LEVELS)
CAN ANYBODY HELP IN THE ,

THANKS

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May 12, 2006

is there any way to define a recursive cte within another cte. I have defined a recursive cte which works great for finding the different versions of a given item. What I would like to do is to define a set of items for which I want to find the different versions.

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How To Query The Using Recursive?

Jun 10, 2007

Hello,
I have the following tables:

Article(articleID,CategoryID,ArticleTitle)
Categories(categoryID,ParentID,CategoryTitle)
I am trying to retrieve the main category ID for a specific article ID.
For example lets say I have this data:
Article:

1, 10 , "some title"
2,10,"some title"
3,11,"some title"
Categories:
1, NULL , "some title"
2, 1, "some title"
10, 2, "some title"
11, 10 , "some title"

In this example I want to know who is the main category of article 3.
The query should return the answer: 1
Thats because:

The article ID 3 is inside category 11.
Parent for category 11 is 10.
Parent for category 10 is 2.
Parent for category 2 is 1
and Parent for category 1 is NULL, which means category 1 has no parents and it is the main category.
Query will return article id, category id, main_category_id, ArticleTitle, CategoryTitle (some union between 2 tables)
Do you have any suggestions for such query?
Thanks all.

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Recursive Query ..

Jan 18, 2008

Recursive quey to show products with "custom defines fields" related by Classifications, instead of per product Hello, I’m working on a project .. .

I’m desperating due to the
complex (for me and also I think for some others) sql query that I need to
write, to show the products with his “custom defined fields�? that are inside a ProductsFieldsByClassification
table that holds this mentioned “custom defined fieds�? according to the Classifications
table, on where the Products can be found trought the productsClassifications
table.

CustomFields can be defined
and set for the products, trought his Classifications (instead of define a
custom field for each product (that consume a lot of data), I decide to use it as
I explain)

I will to know the properly
SQL QUERY to show a list of products with the ProductsFieldsByClassifications and ProductsFieldsValuesByClassifications:

As example on
a Requested ID_Classification = 16 (Torents/Games/Dreamcast/PAL), the products must be show with the
ProductsFields and Values that has the DBA for the:

·
requested
ID_Classification

o
PAL (ID_Classification: 16)

·
AND all
the Classifications that belongs above (trought ID_ParentClassification) that are :

o
Torrents (ID_Classification:
1) that will show the products values for the “Size�?

o
Games (ID_Class..:4) ß this classification has no CustomFields so none from this one.

o
Dreamcast (ID_Class..:14 )
that will show his ID_Classification(14) product field “Levels�? value (but not “AllowSave�? as not have value for any product)

Hmnn i show a graphic that i design for (feel to click over to see at correct resolution)

I also write asp.net tutorials. For those interested see my blog at http://abmartin.wordpress.com

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Feb 26, 2008

i have a table like this
parentid |    childid    |   description
1             2                     blah
1              3
1              4
2              23
2              24
5              8
3              10
and i want to give the parentid 1 and get all the children
i have a cursor now like this but i dont know how to make it recursive any help?

1
2 DECLARE @childid nvarchar(50)
3 DECLARE ItemStruc CURSOR FOR
4
5 SELECT cmponent_prt_no , parent_part_no
6 FROM oauser_prod_structure
7 WHERE parent_part_no = @parentid
8
9 OPEN ItemStruc
10 FETCH NEXT FROM ItemStruc
11 INTO @childNum , @parentid
12
13 WHILE @@FETCH_STATUS = 0
14 BEGIN
15
16 print @childNum +'is the a child to: ' +@parentid

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Recursive SQL Query

Sep 21, 2004

I have a tough issue with a query.

I have the following structure

Table: Users

UserId ParentUserId
1 1
2 1
3 2
4 1
5 4
6 5

I need to write a stored procedure that takes in UserId as parameter and returns everyone under him/her.

So if Param=1 it would return result set of 2,3,4,5,6

Anyone done this before or have any ideas?

Thanks,
ScAndal

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Jul 20, 2005

Hi,

Does anyone know how to do an sql recursion queries?

I believe it involves a view with a union.

I have a User Table and in that table i have a employee_id and a
boss_id. What i'd like to do is to find all employees under a certain
boss.
For example,

Employee_ID Boss_ID
1
2                     1
3
4                     3
5                     2

So if i'd like to know who are under the employee_id = 1 it will return
employee_id 2 and 5 since employee 2 also is the boss of employee_id =
5.

To do that i'd have to have recursion query.

Thanks,

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Recursive Triggers

Dec 14, 2000

I'm using exec sp_dboption 'ilgadmin', 'recursive triggers',true

I made

create trigger
dbo.templates_ondelete
on templates for delete
as
begin
delete pages
where templateid = (select [id] from deleted)
end
go

create trigger
dbo.pages_ondelete
on pages for delete
as
begin
delete pageItems
where pageid = (select [id] from deleted)
end
go

The second trigger must be started by the first one.

But it doens't work because if I do
delete from templates where id = 2 more than one page (7 pages) are deleted and the second trigger doesn't work (it can only delete one by one in pageitems!)

Is there any option in SQL Server that I forgot or can I use an other methode

Best regards
Axel

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Nov 24, 1999

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Dec 3, 2006

CREATE TABLE EMPLOYEE(
Initialschar(3)Not Null,
EmpNamechar(25)Not Null,
CellPhonechar(20),
ExperienceLevel char(12)Not Null,
SupervisorInitials char(3)
CONSTRAINTEmployeePKPRIMARY KEY(Initials),
CONSTRAINTExperienceLevelCK CHECK (ExperienceLevel in
('Junior', 'Senior', 'Master', 'SuperMaster')),
CONSTRAINT SupervisorFK FOREIGN KEY (SupervisorInitials)
REFERENCES EMPLOYEE (Initials)
ON DELETE NO ACTION
ON UPDATE NO ACTION
);

INSERT INTO EMPLOYEE VALUES ('JLM', 'Joe Morrone', '(603) 489-2245', 'Master', NULL)
INSERT INTO EMPLOYEE VALUES ('BNF', 'Brenda Fowler', '(603) 467-8894', 'SuperMaster', NULL)
INSERT INTO EMPLOYEE VALUES ('JG', 'John Gromek', '(603) 678-9987', 'Junior', 'BNF')
INSERT INTO EMPLOYEE VALUES ('BEK', 'Barbara Kimball', '(603) 884-2312', 'Master', 'BNF')

Write a query which reports each employee's name and
-- experience level and the name of his/her supervisor

need help with this query,
the ouput is this ;

Employee ExperienceLevel Supervisor
------------------------- --------------- -------------------------
Barbara Kimball Master Brenda Fowler
John Gromek Junior Brenda Fowler

(2 row(s) affected)

Enhance your query to report all employees, whether or
-- or not they have a supervisor.
some help would be gratifull.

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Jun 5, 2002

Hi,
I have a table with 2 fields in it Circuit_ID and Parent_Circuit_ID and I'd like to pass a stored procedure a circuit_ID and get a resultset back of all Circuit_ID's that are associated with the original.

That means it needs to look at each record and do another search on all circuits that have that parent ID, recursively.

Does anyone have any good ideas on the best way to do this.

Appreciate any help.

Steve

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Nov 1, 2007

I have a table of product types, the table is layed like this:

TypeID
TypeName
ParentID

each type has a ParentID equal to one of the other types TypeID (except the very top level types) to build a hierarchy with several levels.

I need a way of giving a function a single TypeID, and have it return a table that has the the TypeID of every type underneath it in the hierarchy. it could go down several levels (like 10 or more) so it needs to recursively work...

I'm just completely lost...

I can get this to work just fine in VB... but in VB i can just use a nice little for each loop...

any ideas?

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Recursive Function

Feb 1, 2005

I am trying to write a recursive function which allows me to provide a hierarchical structure from an employee table but I am getting an error

Server: Msg 512, Level 16, State 1, Procedure GetEmployee, Line 10
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Is there a way in which I can write a recursive function to do this. Or would I need to use cursors, multiple functions???
Any help or examples would be great. Thanks for your help

CREATE FUNCTION GetEmployee(@EmpID as int)
RETURNS @Employee Table
(
StaffNo int,
ParentStaffNo int
)
AS
BEGIN
DECLARE @ManagerID int
SET @ManagerID = (SELECT [id] FROM eii.dbo.test WHERE Parent_ID = @EmpID)

IF @ManagerID IS NOT NULL and @ManagerID > '' and @ManagerID <> @EmpID
INSERT INTO @Employee
SELECT [id],parent_id FROM eii.dbo.test Where [id] = @ManagerID
UNION
SELECT * FROM GetEmployee(@ManagerID)

RETURN
END

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Recursive Join

Jan 27, 2006

Hey all,
I am writing a procedure to perform a search against products in a website. It is a hierarchical setup, with websites, catalogs, category hierarchies, categories and products. So I need to get all the products that match the search, that are in categories that are in category hierarchies (category-to-category relationship), that are in catalogs that are in 1 website.

I can get the category that a matching product is in, but from there I need to recursive go up the ladder of category hierarchies until it reaches a point where the parent hierarchy is null, and then join that record with the catalogs that are in the 1 website. Here's what I thought might work:

Code:

SELECT ctlgs_CatalogCategoriesToProducts.*
FROM COMMERCE_PRODUCTS
INNER JOIN ctlgs_CatalogCategoriesToProducts ON COMMERCE_PRODUCTS.ITEMNO = ctlgs_CatalogCategoriesToProducts.ItemNo
INNER JOIN ctlgs_CatalogCategoryHierarchies ctlgs_CCH ON ctlgs_CatalogCategoriesToProducts.CategoryID = ctlgs_CatalogCategoryHierarchies.CategoryID

*** some recursive stuff***
WHILE (ctlgs_CatalogCategoryHierarchies.ParentHierarchyID IS NOT NULL)
BEGIN
INNER JOIN ctlgs_CCH ON ctlgs_CatalogCategoryHierarchies.ID = ctlgs_CCH.ParentHierarchyID
END

******

INNER JOIN ctlgs_Catalogs ON ctlgs_CatalogCategoryHierarchies.ID = ctlgs_Catalogs.RootHierarchyID
INNER JOIN ctlgs_CatalogsToWebsite ON ctlgs_Catalogs.ID = ctlgs_CatalogsToWebsite.CatalogID
INNER JOIN ctlgs_Websites ON ctlgs_CatalogsToWebsite.SiteID = ctlgs_Websites.ID
WHERE
ctlgs_Websites.ID = @website
AND COMMERCE_PRODUCTS.BLOCKED = 0
AND (
COMMERCE_PRODUCTS.ITEMNO LIKE @searchTerm
OR COMMERCE_PRODUCTS.DESCRIPTION LIKE @searchTerm
OR COMMERCE_PRODUCTS.DESCRIPTION2 LIKE @searchTerm
)

I've never used WHILE before, so I'm not sure what exactly you can put in there. Any advice would be greatly appreciated, thanks!

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Jul 13, 2004

I have a following structure

table A
userid ReferedBy
BA
C B

Table B
Userid compID
AAlpha
Bself
Cself

now the scenario is :
the user A is from the company "Alpha"
he introduces user B, who registers in the system his company bcomes "self",
now B inturn refers user C who also registers in the system and his company is now again "self".
Now I need to generate a report of number of users that have registered under one company, for eg.
for the company "Alpha" no of users becomes 2 since A refered to two users and both of them have registered.

I m stuck with the query.
thanks in advance...
regards,
Harshal

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Sep 23, 2004

Hi,

I have 2 tables

tblparent

parent_term_id term_id
-------------- -----------
1 2
2 3

tblname

id name
----- ------------------------------------------
1 My top parent node
2 My second node
3 my child node

If I do a search for say 'my child node' I need to display where 'my child node' is in relation to the hierarchy. i.e i need to show it's parent and if that has a parent I need to show its parent etc... and continue until there are no more parents left

So using the table details if i search for 'my child node'

I need to display this :
My top parent node -> My second node - > my child node

The id for 'My top parent node' doesn't exist in tblparent because it is the top parent

Can anybody help with doing this

Thanks in advance

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Sep 29, 2004

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Can A Recursive Query Do This?

Dec 23, 2004

I am wondering if there is some type of recursive query to return the values I want from the following database.

Here is the setup:

The client builds reptile cages.

Each cage consists of aluminum framing, connectors to connect the aluminum frame, and panels to enclose the cages. In the example below, we are not leaving panels out to simplify things. We are also not concerned with the dimensions of the cage.

The PRODUCT table contains all parts in inventory. A finished cage is also considered a PRODUCT. The PRODUCT table is recursively joined to itself through the ASSEMBLY table.

PRODUCTS that consist of a number of PRODUCTS are called an ASSEMBLY. The ASSEMBLY table tracks what PRODUCTS are required for the ASSEMBLY.

Sample database can be downloaded from http://www.handlerassociates.com/cage_configurator.mdb

Here is a quick schema:

Table: PRODUCT
--------------------------
PRODUCTIDPK
PRODUCTNAMEnVarChar(30)

Table: ASSEMBLY
--------------------------
PRODUCTIDPK(FK to PRODUCT.PRODUCTID)
COMPONENTIDPK(FK to PRODUCT.PRODUCTID)
QTYINT

I can write a query that takes the PRODUCTID, and returns all

PRODUCT
=======
PRODUCTIDPRODUCTNAME
--------------------
1Cage Assembly - Solid Sides
2Cage Assembly - Split Back
3Cage Assembly - Split Sides
4Cage Assembly - Split Top/Bottom
5Cage Assembly - Split Back and Sides
6Cage Assembly - Split Back and Top/Bottom
7Cage Assembly - Split Back and Sides and Top/Bottom
833S - Aluminum Divider
933C - Aluminum Frame
10T3C - Door Frame
11Connector Kit
12Connector Socket
13Connector Screws

ASSEMBLY
=========
PRODUCTIDCOMPONENTQTY
---------------------
198
1104
1111
211
281
311
381
411
481
511
582
611
682
711
783
11128
11138

I need a query that will give me all parts for each PRODUCT.

Example: I want all parts for the PRODUCT "Cage Assembly - Split Back"

The results would be:

PRODUCTIDPRODUCTNAME
--------------------
2Cage Assembly - Split Back
1Cage Assemble - Solid Back
933C - Aluminum Frame
10T3C - Door Frame
11Connector Kit
833S - Aluminum Divider
12Connector Socket
13Connector Screws

Is it possible to write such a query or stored procedure?

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Jan 7, 2004

use pubs
sp_configure 'nested triggers',1
go
reconfigure
go
alter database pubs
set RECURSIVE_TRIGGERS ON
go
create table abcd (recid int)
go
create trigger abcd_trigger
on abcd
instead of insert
as
begin
declare @recid int
select @recid = recid + 1 from inserted
insert into abcd values (@recid)
end
go
insert into abcd values (1)
go
select * from abcd
go
drop trigger abcd_trigger
drop table abcd
go

Why does this insert value as 2 even though I have enabled recursive triggers.... Gurus .. any answers????

And as for changing the database options ... please check what they are before executing this post so that you can reset them later.

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May 16, 2006

Hi,
Is there any recursive cursors in sqlserver?If any then what are recursive cursors?
Thanks in advance

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Oct 19, 2007

Can anyone please tell how many recursive triggers can be used in a stored procedure.

Thanks in Advance

RKNAIR

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Dec 6, 2007

Can you please help me to write a recursive query in sql server 2000?

I have got a table WORKORDER. wonum and parent are the two columns in the table. A wonum can have children.Those children can have children, so on. if i am giving a wonum,it should display all the children ,their children and so on.

Sample data in the table is as follows

wonum parent
7792 NULL
7793 7792
165305 7793
7794 7792
7795 7792

eg:
7792 is a workorder,which has got children and grand children

7793 is a child of 7792
165305 is a child of 7793
7794 is a child of 7792 and
7795 is a child of 7792

When I give the 7792 in the query,it should fetch all the children and grand children,etc.
output should be :
7793
165305
7794
7795

How can we do that?

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Jul 23, 2005

Went looking for an answer but not really sure what phrases to lookfor. Just decided to post my question.I have a collection of groups which contain items. I also have acollection of users which can be assigned permissions to both groupsand individual items. If a user has permission to a group then the userhas that permission to each of the items in the group. I need a querywhich will return all the items and permission for a particular user.Here is the code for creating the tables and populating them.CREATE TABLE [Account] ([Name] VARCHAR(10))INSERT INTO [Account] VALUES ('210')INSERT INTO [Account] VALUES ('928')INSERT INTO [Account] VALUES ('ABC')CREATE TABLE [AccountGroup] ([Name] VARCHAR(10))INSERT INTO [AccountGroup] VALUES ('Group1')INSERT INTO [AccountGroup] VALUES ('Group2')CREATE TABLE [AccountGroupMembership] ([GroupName] VARCHAR(10), [AccountName] VARCHAR(10))INSERT INTO [AccountGroupMembership] VALUES ('Group1', '210')INSERT INTO [AccountGroupMembership] VALUES ('Group1', 'ABC')INSERT INTO [AccountGroupMembership] VALUES ('Group2', '928')INSERT INTO [AccountGroupMembership] VALUES ('Group2', 'ABC')CREATE TABLE [Permission] ([User] VARCHAR(10), [Item] VARCHAR(10), [ItemType] VARCHAR(1)-- 'A' for account, 'G' for account group, [ReadPerm] INT, [WritePerm] INT)INSERT INTO [Permission] VALUES ('john', '210', 'A', 1, 0)-- readaccess to 210 accountINSERT INTO [Permission] VALUES ('john', 'Group1', 'G', 1, 1)--read/write access to Group1 groupINSERT INTO [Permission] VALUES ('mary', '928', 'A', 0, 1)-- writeaccess to 928 accountThe simple querySELECT * FROM [Permission] WHERE [User] = 'john'returnsUser Item ItemType ReadPerm WritePerm---------- ---------- -------- ----------- -----------john 210 A 1 0john Group1 G 1 1but what I really want is (notice that Group1 has been replaced withthe two members of Group1)User Item ReadPerm WritePerm---------- ---------- ----------- -----------john 210 1 0john 210 1 1john ABC 1 1(Forget for the moment that 210 is listed twice with differentpermissions. I could take the result and do some sort of union to least(or most) restrictive permissions.)

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Mar 2, 2007

Hello,I'm trying to use a recursive CTE to find some data but I am havingtrouble crafting the CTE; maybe what I want isn't possible.I have the following tables:EMPLOYEE (int ID, int MANAGER_ID)WINNER(int EMPLOYEE_ID)* The heirarchy in EMPLOYEE may be multiple levels deep.* MANAGER_ID is a foreign key to EMPLOYEE.ID* WINNER.EMPLOYEE_ID is a foreign key to EMPLOYEE.IDBasically, I want to generate a list of EMPLOYEE.ID data whichsatisfies the following criteria:1) The ID is present in the WINNER table,-or-2) A child record of the current record, or a child of a child (adinfinitum) is present in the WINNER tableTake the following data in EMPLOYEE:(1,NULL)(2, 1)(3, 2)(4, 1)And the following in WINNER:(3)I want the query to return:123Since 3 is present in WINNER, 3 is included (first condition).Since 3 is present in WINNER, 2 is included (second condition).Since 3 is present in WINNER, 1 is included (second condition).See what I mean? Is this possible using a recursive CTE? I'd rathernot use cursors, etc, unless I really had to. Maybe there is acompletely different way to do this?I'm using SQL Server 2005.Thanks.--Mike

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Jul 20, 2005

I am writing a function which I hope to use as a column value in aselect query. The function recursively walks a taxonomic heirarchy,extracting the name for an organism at the taxonomic level requestedby the user. I'm having trouble figuring out the syntax to call thefunction from itself (see **1), and the value returned.When I test the funciton, it says 'commands completed successfully',but nothing is returned. This is in SQL2000, runing on Windows2000.The table the function acts on is:CREATE TABLE [dbo].[tblbenthictaxa] ([tsn] [int] IDENTITY (1, 1) NOT NULL ,[rank_id] [int] NOT NULL ,[dir_parent_tsn] [int] NULL ,[req_parent_tsn] [int] NOT NULL ,[taxa_name] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NOTNULL) ON [PRIMARY]GOReqParentTSN is the recursive link to rows in the table;Level is the taxonomic level the user requested (an integerrepresenting Order, Family, Genus or Species).CREATE FUNCTION dbo.CBN_RecursTaxa (@ReqParentTSN int,@Level int)RETURNS varchar(100) ASBEGINDeclare @Rank int,@taxaname varchar(100)SELECT @ReqParentTSN = tblbenthictaxa.req_parent_tsn,@TaxaName = tblbenthictaxa.taxa_name,@Rank = tblbenthictaxa.rank_idFROM tblbenthictaxaWHERE tblbenthictaxa.TSN=@ReqParentTSNif @Rank > @Level**1 --exec CBN_RecursTaxa @ReqParentTSN, @LevelRETURN @TaxaNameENDThanks in advance for any help,Tim

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Recursive Query

Jul 20, 2005

Hi there,Need a little help with a certain query that's causing a lot of acidin my stomach...Have a table that stores sales measures for a given client. The salesmeasures are stored per year and there could be multiple salesmeasures every year per client. There is another field called lastupdate date. If there are multiple sales measures then need to selectthe one that's been entered last based on this field. Also, if thereis no sales measure data for current year then I need to return thelast year's data for which sales measure has been entered. Forexample: if client #1 has sales measure value of $200 for 1999 andnothing since, then I need to return $200 for any year following 1999.So the query would look something like this:SELECT client_name, sm_dollars FROM <tables>Based on the DDL at the bottom I would expect to get back: c1, 100;c2, 200The way I am doing it now is with correlated subqueries (3 to beexact) that each do an aggregate and join back to the original table.It works, but it is notoriously slow. SQL Server is scanning theindex and does a merge join which in a large query takes %95 of thetime. Here is the part of the query plan for it:| | | | | | |--MergeJoin(Inner Join, MANY-TO-MANYMERGE:([sales_measure].[client_id])=([sales_measure].[client_id]),RESIDUAL:(([sales_measure].[client_id]=[sales_measure].[client_id]AND [sales_measure].[tax_year]=[sales_measure].[tax_year]) AND[Expr1013]=[sales_measure].[last_update_date]))| | | | | | |--StreamAggregate(GROUP BY:([sales_measure].[client_id],[sales_measure].[tax_year])DEFINE:([Expr1013]=MAX([sales_measure].[last_update_date])))| | | | | | | |--MergeJoin(Inner Join, MERGE:([sales_measure].[client_id],[Expr1010])=([sales_measure].[client_id], [sales_measure].[tax_year]),RESIDUAL:([sales_measure].[client_id]=[sales_measure].[client_id] AND[sales_measure].[tax_year]=[Expr1010]))| | | | | | ||--Stream Aggregate(GROUP BY:([sales_measure].[client_id])DEFINE:([Expr1010]=MAX([sales_measure].[tax_year])))| | | | | | | ||--Index Scan(OBJECT:([stars_perftest].[dbo].[sales_measure].[sales_measure_idx1]),ORDERED FORWARD)| | | | | | ||--Index Scan(OBJECT:([stars_perftest].[dbo].[sales_measure].[sales_measure_idx1]),ORDERED FORWARD)| | | | | | |--IndexScan(OBJECT:([stars_perftest].[dbo].[sales_measure].[sales_measure_idx1]),ORDERED FORWARD)There are two indexes on sales measure table:sales_measure_pk - sales_measure_id (primary key) clusteredsales_measure_idx1 - client_id, tax_year, last_update_date, sm_dollarssales_measure table has 800,000 rows in it.Here is the rest of the DDL:IF OBJECT_ID('dbo.client') IS NOT NULLDROP TABLE dbo.clientGOcreate table dbo.client (client_idintidentityprimary key,client_namevarchar(100)NOT NULL)GOIF OBJECT_ID('dbo.sales_measure') IS NOT NULLDROP TABLE dbo.sales_measureGOcreate table dbo.sales_measure(sales_measure_idintidentityprimary key,client_idintNOT NULL,tax_yearsmallintNOT NULL,sm_dollarsmoneyNOT NULL,last_update_datedatetimeNOT NULL)GOCREATE INDEX sales_measure_idx1 ON sales_measure (client_id, tax_year,last_update_date, sm_dollars)GOINSERT dbo.client(client_name)SELECT'c1' UNION SELECT 'c2' UNION SELECT 'c3'GOINSERTdbo.sales_measure(client_id, tax_year, sm_dollars,last_update_date)SELECT1, 2004, 100, '1/4/2004'UNIONSELECT2, 2003, 100, '1/3/2004'UNIONSELECT 2, 2004, 150, '1/4/2004'UNIONSELECT2, 2004, 200, '1/5/2004'The view that I use to calculate sales measures:CREATE VIEW sales_measure_vw ASSELECTsm.*FROM sales_measure smINNER JOIN (SELECT sm2.client_id, sm2.tax_year,MAX(sm2.last_update_date) as last_update_dateFROM sales_measure sm2INNER JOIN (SELECT sm4.client_id, MAX(sm4.tax_year)as tax_yearFROM sales_measure sm4 GROUP BYsm4.client_id) sm3on sm3.client_id = sm2.client_idand sm3.tax_year = sm2.tax_yearGROUP BY sm2.client_id, sm2.tax_year ) sm1ON sm.client_id = sm1.client_id ANDsm.tax_year = sm1.tax_year ANDsm.last_update_date = sm1.last_update_dateAny advice on how to tame this would be appreciated. Also, any adviceon the indexes would help as well.ThanksBob

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